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Preparing for the Visit to a Deciduous Forest
One of the field experiments you will carry out is to take readings of the temperature, sunlight and humidity in different areas, using a compass to determine your direction.
It is always a good idea to make a note of the weather on the day that you take your readings.
You should choose five different areas in school grounds (see map left). At each of these positions use a compass to find North and place an arrow on your map to indicate its direction.
To practise using a centigrade thermometer to measure the air temperature, take and record the temperature the five different areas you visit around the school.
(Record your readings in °C)
The Light meter
Hold the light metre so that the light sensitive cell is pointing upward. Take the reading indicated by the pointer on the lower, horizontal scale.
(Record your readings as numbers. The light readings have no units. We use the term 'arbitrary units').
Gently wave the hygrometer in the air and record the percentage humidity. (Note that you should not use the hygrometer when it is raining).
(Record your reading as a %. This tells you the percentage of water vapour in the air you are sampling).
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